The Air Force doesn't now nor has it ever claimed a right to monopolize military aviation.
No, not entirely but they fought against the Army arming its helicopters and succeeded in limiting Army aviation to rotary wing when it lost that fight.
Each service has unique needs. When an Army or Marine Battalion Commander needs close air support, it is far more efficient to go to his boss than to have to beg the Air Force for assets. The same applies to the Armys waterborne landing craft. If it had to depend only on the Navy there would be few amphibious landing conducted by the Army.
"The Air Force doesn't now nor has it ever claimed a right to monopolize military aviation.
No, not entirely but they fought against the Army arming its helicopters and succeeded in limiting Army aviation to rotary wing when it lost that fight." I thought they authorized the Army to fly Piper Cubs also?